MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Reaction, allergic
A reaction that occurs when the immune system attacks a usually harmless substance (an allergen) that gains access to the body. The immune system calls upon a protective substance called immunoglobulin E (IgE) to fight these invading…
Read the definitionRandom terms
Show more- Mordant A substance capable of deepening the reaction to a stain (as in the pathology laboratory); incisive; burning…
- Hypospadias A birth defect of the penis involving the urethra (the transport tube leading from the bladder to discharge…
- Newborn screening Tests of newborns to screen for serious treatable diseases most of which are genetic. The newborn screening…
- Refsum disease A genetic disorder affecting the metabolism of the fatty acid phytanic acid. When phytanic acid accumulates…
- Bulimia Bulimia: Also called bulimia nervosa. An eating disorder characterized by episodes of secretive excessive…
- American trypanosomiasis See: Chagas disease
- Domagk, Gerhard German physician and chemist (1895-1946) who discovered the first sulfa drug, prontosil, which ushered in the…
- Minimal change disease The most common form of the nephrotic syndrome, a kidney disorder that affects the structures called…
- Bar graph A visual display using bars to represent the relative size of different categories of a variable, with each…
- Pathologist, speech-language See: Speech-language pathologist
- Cell sorter, fluorescence-activated A flow cytometer (a scientific instrument used to measure the characteristics of individual cells) that is…
- Aerosolization The production of an aerosol -- a fine mist or spray containing minute particles. See: Aerosol